01dodge24v

She will start and drive... just can't move her with and throttle or power till she's fully warm alsonhas dead pedal whenever accelerator is held at a constant position for too long... have to let it idle for about 30 seconds or hold pedal on the floor for 10-20 seconds till she comes alive

I took of my Injection Pump to replace my tappet cover gasket. Truck has seemingly no issues before hand other than a drop in fuel mileage. After taking everything off and putting back on carefully i have come across the following symptoms: trouble codes - p0216/p1693 excessive white smoke at idle dead pedal across all RPM ranges fuel mileage around the 11mpg ranges hard cranking now that temperatures have dropped 0 movement from vehicle before engine gets to around 190* (truck will move under idle but 0 throttle response) I am about to get a fuel pressure gauge to double check but other testing seems within normal limits. Assumption is the vp44 is bad I'm just hoping its something else. If this is the cause any ideas on best place to get a rebuilt one? I have read good things about blue chip diesel. Thoroughbred diesel also has packages that include a new lift pump and injectors. My 01 has about 316k miles and a bd aftermarket pump already. Thanks in advance for any and all help